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How to Replace 3 Lamp Series-Parallel Ballast with Parallel Page 2

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There are two more options for rewiring these lampholders for parallel ballasts.

  1. Replace all of the non-shunted lampholders with shunted. Wire the new ballast as parallel connecting the new ballast wires directly to the new shunted lampholders (option 2).
  2. Remove all of the existing non-shunted lampholders from the fixture and remove all of the wires from each of these lampholders (option 3). Reinstall lampholders after they are rewired.

3 Lamp Series-Parallel Ballast

Factory wiring

After 3 Lamp Ballast is Replaced Option 2

Non-shunted lampholders are replaced with shunted lampholders. Ballast wires are connected directly to the new shunted lampholders.

Wires are removed from existing non-shunted lampholders. Ballast wires are connected directly to one side of the non-shunted lampholders. Each side of the existing lampholders are connected together with a wire to simulate a shunted lampholder.

How to Replace 3 Lamp Series Ballast with Parallel Page 1

After 3 Lamp Ballast is Replaced Option 3

3 Lamp Parallel Ballast Wiring Diagram3 Lamp Series-Parallel Ballast3 Lamp Parallel Nonshuntedl Lampholder Wiring Diagram